<?php

namespace App\Models;

use App\Helpers\Numeric as NumericHelper;
use EloquentFilter\Filterable;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class UserCoupon extends Model
{
    use HasFactory;
    use Filterable;

    /**
     * @var array
     */
    protected $attributes = [
        'is_use' => false,
    ];

    /**
     * @var array
     */
    protected $casts = [
        'is_use' => 'bool',
        'use_start_at' => 'datetime',
        'use_end_at' => 'datetime',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'user_id',
        'coupon_id',
        'coupon_name',
        'coupon_type',
        'coupon_amount',
        'coupon_threshold',
        'use_start_at',
        'use_end_at',
        'is_use',
        'created_at',
        'updated_at',
    ];

    /**
     * 仅查询已过期的优惠券
     */
    public function scopeOnlyExpired($query)
    {
        return $query->where('is_use', false)->where('use_end_at', '<=', now());
    }

    /**
     * 仅查询已使用的优惠券
     */
    public function scopeOnlyUsed($query)
    {
        return $query->where('is_use', true);
    }

    /**
     * 仅查询未使用的优惠券
     */
    public function scopeOnlyUnuse($query)
    {
        return $query->where('is_use', false)->where('use_end_at', '>', now());
    }

    /**
     * 仅查询可用的优惠券
     */
    public function scopeOnlyAvailable($query)
    {
        $time = now();

        return $query->where('is_use', false)->where('use_start_at', '<', $time)->where('use_end_at', '>', $time);
    }

    /**
     * 优惠券可用范围规则
     */
    public function ranges()
    {
        return $this->hasMany(CouponRange::class, 'coupon_id', 'coupon_id');
    }

    /**
     * 确认此优惠券是否是折扣券
     *
     * @return bool
     */
    public function isDiscountCoupon(): bool
    {
        return $this->coupon_type === Coupon::TYPE_DISCOUNT;
    }

    /**
     * 确认此优惠券是否支持商品使用
     *
     * @param \App\Models\ProductSku $sku
     * @return bool
     */
    public function isSupport(ProductSku $sku): bool
    {
        if ($this->ranges->count() === 0) {
            return true;
        }

        foreach ($this->ranges as $range) {
            if (
                ($range->isTypeCategory() && in_array($sku->category_id, $range->rangeIds))
                || ($range->isTypeProduct() && in_array($sku->id, $range->rangeIds))
            ) {
                return true;
            }
        }

        return false;
    }

    /**
     * 将此优惠券标记为已使用
     */
    public function markAsUse()
    {
        $this->forceFill([
            'is_use' => true,
        ])->save();
    }

    /**
     * 获取此优惠券的面值
     *
     * @return string
     */
    public function getCouponAmountFormatAttribute(): string
    {
        $value = $this->attributes['coupon_amount'];

        // 如果是折扣券
        if ($this->isDiscountCoupon()) {
            return NumericHelper::trimTrailingZero(bcdiv($value, 10, 1));
        }

        return NumericHelper::trimTrailingZero(bcdiv($value, 100, 2));
    }

    /**
     * 获取此优惠券的面值
     *
     * @return string
     */
    public function getCouponThresholdFormatAttribute(): string
    {
        return NumericHelper::trimTrailingZero(
            bcdiv($this->attributes['coupon_threshold'], 100, 2)
        );
    }
}